Hwy 240 over South Slough
Coos County, Oregon · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hwy 240 over South Slough in Coos County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1991, making it 34 years old at the 2025 inventory.
- It carries about 5,624 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 160 of the 255 inventoried bridges in Coos County rated fair (62.7%); 8 (3.1%) are rated poor.
- Its traffic status in the 2025 inventory is posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Status change: newly posted for load since 2024.
- Its most recent inspection on record is dated August 2023, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (43.33892, -124.32123)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel movable bascule |
| Length | about 1,192 ft |
| Location | Charleston |
| NBI structure number | 01940G240 00839 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Coos County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US101(HWY009) over Coalbank Slough | 1987 | 31,461 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 19,023 | Fair |
| US101(HWY009) over Cbrl | 1935 | 19,023 | Fair |
| Hwy 240 over Pony Creek | 1983 | 18,158 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 17,390 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 17,390 | Fair |
All bridges nearby: Coos County, OR bridge conditions · every bridge in Coos County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.